From http://raygrasso.com/posts/2015/04/using-ctags-on-modern-javascript.html Ctags Setting for ES6

new_gist_file.js

--languages=-javascript
--langdef=js
--langmap=js:.js
--langmap=js:+.jsx

//
// Constants
//

// A constant: AAA0_123 = { or AAA0_123: {
--regex-js=/[ \t.]([A-Z][A-Z0-9._$]+)[ \t]*[=:][ \t]*([0-9"'\[\{]|null)/\1/n,constant/

//
// Properties
//

// .name = {
--regex-js=/\.([A-Za-z0-9._$]+)[ \t]*=[ \t]*\{/\1/o,object/

// "name": {
--regex-js=/['"]*([A-Za-z0-9_$]+)['"]*[ \t]*:[ \t]*\{/\1/o,object/

// parent["name"] = {
--regex-js=/([A-Za-z0-9._$]+)\[["']([A-Za-z0-9_$]+)["']\][ \t]*=[ \t]*\{/\1\.\2/o,object/

//
// Classes
//

// name = (function()
--regex-js=/([A-Za-z0-9._$]+)[ \t]*=[ \t]*\(function\(\)/\1/c,class/

// "name": (function()
--regex-js=/['"]*([A-Za-z0-9_$]+)['"]*:[ \t]*\(function\(\)/\1/c,class/

// class ClassName
--regex-js=/class[ \t]+([A-Za-z0-9._$]+)[ \t]*/\1/c,class/

// ClassName = React.createClass
--regex-js=([A-Za-z$][A-Za-z0-9_$()]+)[ \t]*=[ \t]*[Rr]eact.createClass[ \t]*\(/\1/c,class/

// Capitalised object: Name = whatever({
--regex-js=/([A-Z][A-Za-z0-9_$]+)[ \t]*=[ \t]*[A-Za-z0-9_$]*[ \t]*[{(]/\1/c,class/

// Capitalised object: Name: whatever({
--regex-js=/([A-Z][A-Za-z0-9_$]+)[ \t]*:[ \t]*[A-Za-z0-9_$]*[ \t]*[{(]/\1/c,class/

//
// Functions
//

// name = function(
--regex-js=/([A-Za-z$][A-Za-z0-9_$]+)[ \t]*=[ \t]*function[ \t]*\(/\1/f,function/

//
// Methods
//

// Class method or function (this matches too many things which I filter out separtely)
// name() {
--regex-js=/(function)*[ \t]*([A-Za-z$_][A-Za-z0-9_$]+)[ \t]*\([^)]*\)[ \t]*\{/\2/f,function/

// "name": function(
--regex-js=/['"]*([A-Za-z$][A-Za-z0-9_$]+)['"]*:[ \t]*function[ \t]*\(/\1/m,method/

// parent["name"] = function(
--regex-js=/([A-Za-z0-9_$]+)\[["']([A-Za-z0-9_$]+)["']\][ \t]*=[ \t]*function[ \t]*\(/\2/m,method/